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Simple method for ozone oxidation preparation of alpha-FeOOH, beta-MnO2 and Co3O4 nano material

A nano-material and ozone oxidation technology, applied in the direction of manganese oxide/manganese hydroxide, cobalt oxide/cobalt hydroxide, iron oxide/iron hydroxide, etc., can solve the problem of less application of ozone, and achieve low cost and various shapes , the effect of simple response

Inactive Publication Date: 2007-09-19
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, ozone has been rarely used in the preparation of nanomaterials, and only TiO 2 Gas phase preparation of nanoparticles [Schleich, D.M.and Walter, II.Nanostruct.Mater.1997,8,579-586.] and α-MnO 2 and γ-MnO 2 Preparation of microstructures [Kijima, N.; Yasuda, H.; Sato, T. and Yoshimura, Y.J. Solid State Chem. 2001, 159, 94-102.]

Method used

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  • Simple method for ozone oxidation preparation of alpha-FeOOH, beta-MnO2 and Co3O4 nano material
  • Simple method for ozone oxidation preparation of alpha-FeOOH, beta-MnO2 and Co3O4 nano material
  • Simple method for ozone oxidation preparation of alpha-FeOOH, beta-MnO2 and Co3O4 nano material

Examples

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Embodiment 1

[0039] Weigh FeSO 4 ·7H 2 O 1.20g was dissolved in 40ml water, and ozone was passed through with 0.30mg / min flow for 30 minutes under stirring, and the precipitate was washed with distilled water and dried to obtain FeOOH nanoparticles with a particle diameter of 20-40 nanometers. The electron microscope photo is shown in Figure 1 .

Embodiment 2

[0041] Weigh FeSO 4 ·7H 2 O 1.20g was dissolved in 40ml of water, and ozone was passed through at a flow rate of 0.30mg / min for 30 minutes under stirring, transferred to a closed reactor and heated at 150°C for 8 hours, after cooling, the precipitate was washed with distilled water and dried to obtain a diameter of 30 nanometers The electron micrographs of FeOOH nanorods with a length of about 200 nanometers are shown in Figure 2.

Embodiment 3

[0043] Weigh Co(CH 3 COO) 2 4H 2 O 0.50g was dissolved in 20ml of water, and ozone was passed through at a flow rate of 0.30mg / min for 30 minutes under stirring, transferred to a closed reactor and heated at 150°C for 4 hours, after cooling, the precipitate was washed with distilled water and dried to obtain a particle size of 10-20 nm Co 3 o 4 nanoparticles. Electron microscope photos are shown in Figure 3.

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Abstract

The present invention relates to the preparation of alpha-FeOOH, beta-MnO2 and Co304 nanometer material to obtain a plurality of nanometer structure of different appearances, such as alpha-FeOOH nanobar,beta-MnO2 nanoline, Co304 nanocubes, etc,. by a method of agitating at normal temperature, or the combination of agitating at normal temperature and hydrothermal method, using ozone and corresponding bivalence soluble salt as raw material. The preparation method has the advantages of simple operation, gentle condition and high purity product. The raw material of the present invention is cheap and available without any organic compound and is characterized in low cost, environmental protection, strong practicability and wide application prospect.

Description

technical field [0001] The invention belongs to the field of inorganic material preparation technology and nanomaterial preparation, and relates to the preparation of α-FeOOH and β-MnO by using ozone as an oxidant 2 and Co 3 o 4 A green and easy way to nanomaterials. Background technique [0002] Transition metal oxide materials have a wide range of applications. For example, α-FeOOH (also known as iron oxyhydroxide, goethite) can be used as pigment and catalyst [(a) Colon, D.; Weber, E.J.; Anderson, J.L.Environ.Sci.Technol.2006, 40, 4976; (b) Wu, J.J.; Muruganandham, M.; Yang, J.S.; Lin, S.S. Catal. Commun. 2006, 7, 901.], but also an important raw material for the preparation of hematite and maghemite. β-MnO 2 (pyrolusite) can be used as catalyst, ion sieve and electrode material [(a) Cheng, F.; Zhao, J.; Song, W.; Li, C.; Ma, H.; Chen, J. and Shen, P. Inorg. Chem. 2006, 45, 2038-2044; (b) Zhou, F.; Zheng, H.; Zhao, X.; . Nanotechnology 2005, 16, 2072-2076]. Cobalt...

Claims

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Application Information

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IPC IPC(8): C01G49/02C01G45/02C01G51/04
Inventor 张爱民董玉明杨红晓何坤
Owner NANJING UNIV
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